In this paper, the author established the generalized Ulam - Hyers stability of Derivations of additive and quadratic (AQ)- functional equation
f(x + y) + f(x − y) = 2f(x) + f(y) + f(−y).
@article{1326, title = {Generalized Ulam - Hyers Stability of Derivations of a AQ - Functional Equation}, journal = {CUBO, A Mathematical Journal}, volume = {15}, year = {2013}, language = {en}, url = {http://dml.mathdoc.fr/item/1326} }
Arunkumar, M. Generalized Ulam - Hyers Stability of Derivations of a AQ - Functional Equation. CUBO, A Mathematical Journal, Tome 15 (2013) . http://gdmltest.u-ga.fr/item/1326/